A study of preheating characteristics according to various preheating methods for laser-assisted machining

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• 作者：Seong-Ju Hwang ; Won-Jung Oh ; Choon-Man Lee
• 关键词：Laser ; assisted machining ; Silicon nitride ; Thermal analysis ; Preheating methods
• 刊名：The International Journal of Advanced Manufacturing Technology
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：86
• 期：9-12
• 页码：3015-3024
• 全文大小：7,024 KB
• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering
  Production and Logistics
  Mechanical Engineering
  Computer-Aided Engineering and Design
  
• 出版者：Springer London
• ISSN：1433-3015
• 卷排序：86

文摘

Laser-assisted machining (LAM) is being actively studied as a new method for machining difficult-to-cut materials. In LAM, machining is performed after preheating the material using a laser. Among difficult-to-cut materials, silicon nitride, a type of ceramic material, is difficult to machine due to its high strength at high temperature and high thermal conductivity. Although machining of silicon nitride using laser-assisted turning has been performed, there are few studies and results using laser-assisted milling because it is difficult to maintain the proper preheating temperature of silicon nitride. So, in this study, three preheating methods, one-way, zig-zag, and back-and-forth, are proposed for machining silicon nitride using laser-assisted milling. The preheating effect according to the three preheating methods is analyzed by finite element analyses and experiments. And, the back-and-forth method is verified to be the most effective method.